body {
    position: relative;
    height: 100vh;
}

.menu {
    width: 180px;
    height: 240px;
    background: #fff;
    padding: 10px 15px;
    box-sizing: border-box;
    border-radius: 6px;
    box-shadow: 1px 1px 13px #cdcdcd;
    position: absolute;
}
.menu li {
    display: flex;
    align-items: center;
    height: 38px;
    padding-left: 10px;
    cursor: pointer;
}
.menu li:hover {
    background: #ece8e8;
    border-radius: 4px;
}
.menu li i {
    margin-right: 15px;
}
.menu li span {
    font-size: 14px;
}

.hidden {
    display: none;
}